Static kVTDecompressionPropertyKey_MaximizePowerEfficiency 

pub unsafe static kVTDecompressionPropertyKey_MaximizePowerEfficiency: &'static CFString

Available on crate feature VTDecompressionProperties only.

Hints to the video decoder that it should maximize power efficiency during decoding.

For decompression where the client is operating in the background, clients may set this property to kCFBooleanTrue, which indicates that the decoder can take steps to minimize impact on power usage and other system activity. Setting the property to NULL is equivalent to setting it to kCFBooleanFalse. Setting both kVTDecompressionPropertyKey_MaximizePowerEfficiency and kVTDecompressionPropertyKey_RealTime is unsupported and results in undefined behavior. Not all video decoders may support this property By default, this property is NULL.

See also Apple’s documentation